[json] AngularJS - $http.post send data as json

I'm working on autocomplete directive with angularjs but having some issues.

I have a form which have an autocomplete input. When i type something there, the term variable is sent as JSON:

But, when i use the same function (from different angular controller, but the same function) in another form the term variable sent perfectly and the autocomplete works fine:

Here is my angular function:

$scope.getCustomers = function (searchString) {
    return $http.post("/customer/data/autocomplete",
        {term: searchString})
        .then(function (response) {
            return response;
        });
};

What do you think is wrong?

i think the most proper way is to use the same piece of code angular use when doing a "get" request using you $httpParamSerializer will have to inject it to your controller so you can simply do the following without having to use Jquery at all , $http.post(url,$httpParamSerializer({param:val}))

app.controller('ctrl',function($scope,$http,$httpParamSerializer){
  $http.post(url,$httpParamSerializer({param:val,secondParam:secondVal}));
}

Consider explicitly setting the header in the $http.post (I put application/json, as I am not sure which of the two versions in your example is the working one, but you can use application/x-www-form-urlencoded if it's the other one):

$http.post("/customer/data/autocomplete", {term: searchString}, {headers: {'Content-Type': 'application/json'} })
        .then(function (response) {
            return response;
        });

Use JSON.stringify() to wrap your json

var parameter = JSON.stringify({type:"user", username:user_email, password:user_password});
    $http.post(url, parameter).
    success(function(data, status, headers, config) {
        // this callback will be called asynchronously
        // when the response is available
        console.log(data);
      }).
      error(function(data, status, headers, config) {
        // called asynchronously if an error occurs
        // or server returns response with an error status.
      });